It actually MIGHT not get cancelled at the 30 day mark! In July ,we decided to cancel our September trip because I'm pregnant and assumed that I would be too uncomfortable. I called and cancelled. I never thought about it again and didn't think anything about not getting a cancellation email. Anyway, about a week and a half ago, I got a call from Disney. She said that they had never received payment for our trip.....which should have started 9/23! I don't know what happened but we chalked it up to a computer problem on the day I cancelled. I did get a reminder email at 30 days but it got lost in a bunch of junk email and I never noticed it! The lady did tell me that if I wanted to, I could go ahead and pay because the reservation was still good!
Now, I wish we had never cancelled because I feel great!! We actually rescheduled a quick 4 day trip in early October but it's a secret! shhhhh